Monopodial epiphytic herbs, pseudobulbs absent. Stem erect, often woody, mostly unbranched. Leaves somewhat fleshy, more or less folded lengthwise. Inflorescences axillary, simple or branched. Flowers non-resupinate, fleshy. Petals and sepals similar; lip saccate or with a short spur. Pollinia 4, joined in 2 pairs.
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